http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
재령보정 유효계수방법에 의한 프리스트레스트 합성거더의 장기거동 실험 검증
배두병(Doo Byong Bae),오창국(Chang Kook Oh),최석환(Sok Hwan Choi) 한국강구조학회 2012 韓國鋼構造學會 論文集 Vol.24 No.5
Prestressed composite girders provide efficient composite action by applying prestress to the sub-encasing concrete. In this study, an enhanced prestressed composite girder with forms suspended from the steel girder is utilized. Long-term behavior of the prestressed composite girder is estimated using age-adjusted effective modulus method, which is verified experimentally using measurements obtained from an in-service bridge. Then, parametric study is carried out to investigate the influences caused by ambient temperature, humidity, prestressing and concrete casting date.
Soon Oh Kwon(권순오),Kyeong-Hyeon Byeon(변경현),Jae-Wook Chung(정재욱),Yun-Sok Ha(하윤석),Seock Hwan Choi(최석환),Bum Soo Kim(김범수),Hyun Tae Kim(김현태),Tae-Hwan Kim(김태환),Eun Sang Yoo(유은상),Ghil Suk Yoon(윤길숙),Jun Nyung L 대한비뇨기종양학회 2020 대한비뇨기종양학회지 Vol.18 No.2
Purpose: To determine an appropriate surgical technique, it is important to predict pathological results for patients with clinically localized prostate cancer (PCa) eligible for nerve-sparing radical prostatectomy (NSRP). Several studies have highlighted that serum testosterone level was associated with aggressive features of PCa. Therefore, we analyzed factors, including serum testosterone, to predict upstaging and upgrading after surgery for patients with clinically localized PCa eligible for NSRP. Materials and Methods: We retrospectively evaluated patients who underwent radical prostatectomy (RP) between January 2015 and May 2018 at our institution. Patients with Gleason grade group 1 or 2 on biopsy, prostate-specific antigen<10, and ≤clinical/radiologic stage T2 were included in this study. Upstaging and upgrading were defined as pathological stage≥T3a and Gleason grade group≥3, respectively. We evaluated the patients’ demographics and outcomes according to upstaging and upgrading after surgery. Predictive factors for upstaging and upgrading were analyzed using a multivariate logistic regression model. Results: Of 108 patients included in the study, upstaging and upgrading after surgery were observed in 24 (22.2%) and 36 (33.3%), respectively. Low serum testosterone level, small prostate size, and positive core number≥3 on biopsy were identified as predictive factors for upstaging in multivariate analysis. Although serum testosterone was associated with upgrading in univariate analysis, only clinical/radiologic stage and biopsy Gleason grade group were observed as predictive factors for upgrading in multivariate analysis. Conclusions: Serum testosterone level was identified as a predictive factor for upstaging after RP for clinically localized PCa eligible for NSRP.
Kyong Min Park(박경민),Jae-Wook Chung(정재욱),Jun-Koo Kang(강준구),Teak Jun Shin(신택준),Se Yun Kwon(권세윤),Hyun Chan Jang(장현찬),Yun-Sok Ha(하윤석),Seock Hwan Choi(최석환),Wonho Jung(정원호),Jun Nyung Lee(이준녕),Byung Hoon Kim 대한비뇨기종양학회 2020 대한비뇨기종양학회지 Vol.18 No.1
Purpose: The aim of this study was to analyze the perioperative complications and oncological outcomes of radical prostatectomy (RP) in patients who underwent multiple prostate biopsies. Materials and Methods: A total of 1,112 patients who underwent RP between January 2009 and April 2016 at 4 different centers were included in this study. We divided these patients into 2 groups: patients who underwent only 1st biopsy, and those who underwent 2nd or more repeated biopsies. The association between the number of prior biopsies and perioperative complications and biochemical recurrence (BCR) was analyzed. Results: Of 1,112 patients, 1,046 patients (94.1%) underwent only 1st biopsy, and 66 (5.9%) underwent 2nd or more repeated biopsies. There were no significant differences in preoperative prostate-specific antigen levels, operation times, blood loss volumes, or hospital stay durations (all p>0.05). Patients who underwent multiple prostate biopsies presented with a localized tumor significantly more often (p<0.05). The Gleason score and rate of positive surgical margins were significantly lower in patients with multiple biopsies (all p<0.05). The Cox proportional hazards model analysis indicated that there was no association between the number of prior prostate biopsies and BCR (p>0.05). Kaplan-Meier curve analysis indicated that BCR-free survival rates between the 2 groups were similar (p>0.05). Conclusions: Multiple prostate biopsies are not associated with an increased risk of perioperative complications, adverse pathological outcomes, or higher rates of BCR in patients who have undergone RP.